package edu.sctu.practice.class02.yangshengyu.assign02.test01;

/**
 * Created by Cullen on 2015/10/8.
 */
public class Circle {
    Circle() {
    }
    double area;
    public double p=Math.PI;
    private double radius;
    public double radiusValue;
    public static int numOfObjects;        //定义东西咯

    public double countArea(){         //计算圆面积咯
        radius=radiusValue;
        area=radius*radius*p;
        return area;
    }

}